Motor driven thread cutter



Dec. 8, 1931. M. E. OH. KELLEHER 1,835,308

MOTOR DRIVEN THREAD CUTTER Filed March 17, 1931 314w wtoz ar'tawu o.

Patented Dec. 8, 1931 MARY E. OHEARN KELLEHER, F RUTLAND, VERMQIQ'T Moron DRIVEN 'rznnancnrrnn ilpplieatioir'filed ivrai n ir, i931,

'lhe invention aims 'toprovide an enceptionally simple andinexpensive, yet a rapid and desirable cutter for threads, ra'vellings and'cloth, which'may be driven at will by an electric motor. I j i A The device embodies a stationary cutter having a notch torece'ive the thread or other material to be cut, and a rotary, cutter lying against said stationary cutter, said rotary 0 cutter being mounted upon. the shaft of the electic motor, but if desired, said rotar cutter could be mounted upon a rotatable shaft other than a motor shaft. In either instance, another object'of the invention to provide novel means for tightly holding the rotary-against the fixed cutter;

A still further aim is to provide a fixed cutter attached in a novel manner to the base of an electric motor. 1

Yet another aim is the provision of a unique guard to overcome liability of personal injury. 1 V

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description be ing accomplished by reference to the accompanying drawings.

Fig. l is a perspective view. Fig. 2 is a side elevation with the guard in section.

' Fig. 3 is an end elevation. v

Fig. 4 is a transverse sectional view on line 1% of Fig. 2. V

Fig. 5 is a detail longitudinal section on line 55 of Fig. 3. i v

A preferred construction has been illustrated and will be specifically described, with the understanding however, that within the scope of the invention as claimed, variations may be made.

An electric motor 6 is shown having an which is provlded J switch 12 for controlling current supply Serial vided with t he conventional means for coniiecting them with an electric light socket.

A rotary cutter 14: having racial cutting arms 15, is mounted upon the shaft-16 of the motor (3, andsaid cutter 14 maybe slidably I keyed upon said shaft, as denoted at 17.

cutterla 'rovided with a fiat outer side, 7

.and fiat vertical cutter plate 18 lies against said flat side, said plate being formed with a notch 19 through which the threads or other material to be cut, are inserted into the pathot the arms 15. The lower end of the plate' 18 is integral with a horizontal base bar 20' which extends under the crown portion of the arched the latter by base 7 and is secured to screws or the like 21.

A vertical pressure plate 22 rises from the base bar 20 and is provided at its lower end with a finger 23 received somewhat loosely in an opening 24- formed through said base bar. The up per end of the plate 22 is formed with an opening 25 through which the shaft 7 16'passes, an

said plate (521 d at oppo site sides of said shaft, lllGS bearing balls 26 Which. en-

the inner end of the rotary cutter 14.

A bolt 2? pa sses through alined openings in th'e fixedcutter plate '18 and in the pressure plate 22-, and by tightening the nut 28 oi. said bolt, the pressure plate 22 may be so adjusted toward the fixed cutter plate 18 as to insure proper contact between the cutter arms 15 and said plate l8.

A. suitable arched guard 29 embraces the cutter plate 18 and the opposed hub 30 of the motor 6, the provided w1 lower end of said guard being thspring fingers 31 which engage the base bar 20 to hold the guard in place the 7 two The frontot the guard 29 is formed fWllQll a notch- 32 registering with the notch 19,

notches jointly forminga throat across which theth ead or the lik to be cut,

placed to be acted upon" by. the co-acting rotary and fixed-c tters. The j guard 29 coope te's with adjacent portions of the device in tor-min k and th rotarycutter 1a sweeps across a pertion of said cuttin operation. V 1 j'l t will; be seenfroin the foregoing that although the d casing having the throat 19-32,

throat to p'erformthe desired eviceqis exceptionally simple and inexpensive, it will be highly efficient and desirable for cutting threads, ravellings, cloth, etc. lVhile the details disclosed may be considered as preferred, attention is invited to the fact that within the scope of the invention as claimed, numerous variations may be made.

I claim 1. A device of the class described comprising an electric motor having a base and a horizontal shaft above said base, a rotary cutter carried by said shaft, a stationary vertical cutter plate lying against the outer side of said rotary cutter and having a thread-receiving notch, a horizontal base bar carrying said vertical cutter plate, and means securing said base bar to the motor base together with a vertical pressure plate connected at its lo. er and with smd base bar and having bearing means at its upper end engaging said rotary cutter, and means engaging said pressure plate and said stationary cutter plate for moving the former toward the latter to maintain contact between the two cutters.

2. A device of the class described comprising an electric motor having a base and a horizontal shaft above said base, a rotary cutter carried by said shaft, a stationary vertical cutter plate lying against the outer side of said rotary cutter and having a thread-receiving notch, a horizontal base bar carrying said vertical cutter plate, and means securing said base bar to the motor base; together with an arched guard embracing said vertical cutter plate and having spring fingers at its lower end engaging said supporting bar.

3. A device of the class described comprising a cutter plate having a notch, a rotary cutter lying against one side of said plate and having cutting arms to sweep across said notch, a shaft carrying said rotary cutter, a pressure plate having an opening through which said shaft passes, said pressure plate having bearing means adjacent said opening engaging the inner side of said rotary cutter, and means for moving said pressure plate toward said stationary cutter plate.

4. A device of the class described comprising a cutter plate having a notch, a rotary cutter lying against one side of said plate and having cutting arms to sweep across said notch, a shaft carrying said rotary cutter, a pressure plate having an opening through which said shaft passes, said pressure plate having bearing means adjacent said opening engaging the inner side of said rotary cutter, a base carrying said stationary cuttcr'plate, the lower end of said pressure plate being connected with said base, and means for moving said pressure plate toward said stationary cutter plate.

5. A device of the class described, comprising an electric motor Whose shaft pr0- jects beyond one end of the motor housing, a fixed casing mounted at said end of said motor housing around said projecting shaft end; said casing having an outer end wall at right angles to the shaft, a peripheral wall laterally spaced from said shaft and forming with said outer end wall a right angular corner for the casing, and a notch in said corner to receive athread or other article to be cut; and a rotary cutter carried by said projecting shaft end within said casing and operable across said notch.

6. A device of the class described, comprising an electric motor having a base and a horizontal shaft above said base, a right angular metal bar having a horizontal end secured to said base and a vertical end extending upwardly beyond said shaft, said vertical bar end being disposed in a plane at right angles to the shaft and having a notch in one edge, and a rotary cutter carried by said shaft and contacting with the inner side of said vertical bar end, said cutter being operable across said notch.

In testimony whereof I affix my signature.

MARY E. OHEARN KELLEHER. 

